Machine operating according to the moineau principle,...

E - Fixed Constructions – 21 – B

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E21B 4/02 (2006.01) F03B 13/02 (2006.01) F04C 2/107 (2006.01)

Patent

CA 2271647

A Moineau machine has an outer metal member with an inner elastomer lining and a helical inner member. The outer metal member and the inner helical member are rotatable relative to one another. The outer metal member has a helical shape with an axial center axis. The outer metal member as well as the inner elastomer lining have a uniform wall thickness in the axial direction. The outer metal member has a wave-shaped radial cross-section such that between convex portions concave portions are positioned.

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